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From: Bin Meng <bmeng.cn@gmail.com>
To: "Alistair Francis" <alistair.francis@wdc.com>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
	"Peter Maydell" <peter.maydell@linaro.org>,
	"Francisco Iglesias" <frasse.iglesias@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Bin Meng <bin.meng@windriver.com>,
	qemu-devel@nongnu.org, qemu-block@nongnu.org,
	Max Reitz <mreitz@redhat.com>
Subject: [PATCH 5/9] hw/block: m25p80: Support fast read for SST flashes
Date: Thu, 14 Jan 2021 23:08:58 +0800	[thread overview]
Message-ID: <20210114150902.11515-6-bmeng.cn@gmail.com> (raw)
In-Reply-To: <20210114150902.11515-1-bmeng.cn@gmail.com>

From: Bin Meng <bin.meng@windriver.com>

Per SST25VF016B datasheet [1], SST flash requires a dummy byte after
the address bytes. Note only SPI mode is supported by SST flashes.

[1] http://ww1.microchip.com/downloads/en/devicedoc/s71271_04.pdf

Signed-off-by: Bin Meng <bin.meng@windriver.com>
---

 hw/block/m25p80.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index e1e5d5a76f..512af61ba5 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -928,6 +928,9 @@ static void decode_fast_read_cmd(Flash *s)
     s->needed_bytes = get_addr_length(s);
     switch (get_man(s)) {
     /* Dummy cycles - modeled with bytes writes */
+    case MAN_SST:
+        s->needed_bytes += 1;
+        break;
     case MAN_WINBOND:
         switch (s->cmd_in_progress) {
         case FAST_READ:
-- 
2.25.1



  parent reply	other threads:[~2021-01-14 15:20 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14 15:08 [PATCH 0/9] hw/block: m25p80: Fix the mess of dummy bytes needed for fast read commands Bin Meng
2021-01-14 15:08 ` [PATCH 1/9] hw/block: m25p80: Fix the number of dummy bytes needed for Windbond flashes Bin Meng
2021-01-14 15:08 ` [PATCH 2/9] hw/block: m25p80: Fix the number of dummy bytes needed for Numonyx/Micron flashes Bin Meng
2021-01-14 15:08 ` [PATCH 3/9] hw/block: m25p80: Fix the number of dummy bytes needed for Macronix flashes Bin Meng
2021-01-14 15:08 ` [PATCH 4/9] hw/block: m25p80: Fix the number of dummy bytes needed for Spansion flashes Bin Meng
2021-01-14 15:08 ` Bin Meng [this message]
2021-01-14 15:08 ` [PATCH 6/9] hw/ssi: xilinx_spips: Fix generic fifo dummy cycle handling Bin Meng
2021-01-14 15:09 ` [PATCH 7/9] Revert "aspeed/smc: Fix number of dummy cycles for FAST_READ_4 command" Bin Meng
2021-01-14 15:09 ` [PATCH 8/9] Revert "aspeed/smc: snoop SPI transfers to fake dummy cycles" Bin Meng
2021-01-14 15:09 ` [PATCH 9/9] hw/ssi: npcm7xx_fiu: Correct the dummy cycle emulation logic Bin Meng
2021-01-14 17:12   ` Havard Skinnemoen via
2021-01-14 15:59 ` [PATCH 0/9] hw/block: m25p80: Fix the mess of dummy bytes needed for fast read commands Cédric Le Goater
2021-01-14 16:12 ` no-reply
2021-01-14 18:13 ` Francisco Iglesias
2021-01-15  2:07   ` Bin Meng
2021-01-15  3:29     ` Havard Skinnemoen via
2021-01-15 13:54       ` Bin Meng
2021-01-15 12:26     ` Francisco Iglesias
2021-01-15 14:38       ` Bin Meng
2021-01-18 10:05         ` Francisco Iglesias
2021-01-18 12:32           ` Bin Meng
2021-01-19 13:01             ` Francisco Iglesias
2021-01-20 14:20               ` Bin Meng
2021-01-21  8:50                 ` Francisco Iglesias
2021-01-21  8:59                   ` Bin Meng
2021-01-21 10:01                     ` Francisco Iglesias
2021-01-21 14:18                     ` Francisco Iglesias
2021-02-08 14:41                       ` Bin Meng
2021-02-08 15:30                         ` Edgar E. Iglesias
2021-02-09  9:35                           ` Francisco Iglesias
2021-04-23  6:45                         ` Bin Meng
2021-04-27  5:56                           ` Alistair Francis
2021-04-27  8:54                             ` Francisco Iglesias
2021-04-27 14:32                               ` Cédric Le Goater
2021-04-28 13:12                                 ` Bin Meng
2021-04-28 13:54                                   ` Cédric Le Goater

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